I have of course written about Online Backup Sources a few weeks ago, but just found another service that is now offering a free 3GB plan.
Memopal is an online backup provider that also allows you access to your files on other devices. Memopal also allows you to share files with others if you are so inclined. Here is a blurb and some screenshots offered by Memepal.
As well as supporting Windows, Mac and Linux, the files archived on Memopal can also be accessed from an iPhone using a free application and from any mobile device with a browser.
In addition to the free plan, they are also adding an additional 50GB to paid plans which start at $49 per year. And if you already have an online data backup provider, then you may be interested in Memopal’s 30% discount for switching.
Note: I am not affiliated with Momopal in any way.